Dissociative Identity Disorder

DID — once called Multiple Personality Disorder — is a documented psychological condition where distinct identities take turns in control of one body. The strangeness goes deeper than personality: clinicians have recorded cases where one alter has measurable allergies, requires glasses, or shows different blood pressure — while another, in the same body, does not. The mind, somehow, is voting on the body.

Quick facts

• Recognised by the DSM since 1980.
• Often follows severe childhood trauma.
• Alters can show different allergies, eyesight, even handedness.
• Average time to a correct diagnosis: 5 to 12 years.

Sources

• Wikipediaen.wikipedia.org
• Britannicabritannica.com